Follow these security best practices to ensure your authentication implementation is secure.

Token Storage

• Never store tokens in localStorage
• Use httpOnly cookies when possible
• Implement secure token refresh flows

PKCE Implementation

Always use PKCE for public clients:

const codeVerifier = generateRandomString();
const codeChallenge = await sha256(codeVerifier);

auth.loginWithRedirect({
  code_challenge: codeChallenge,
  code_challenge_method: 'S256'
});

API Security

• Always use HTTPS
• Validate tokens on every request
• Implement rate limiting

XSS Prevention

// Sanitize user input
const sanitized = DOMPurify.sanitize(userInput);

CSRF Protection

• Use SameSite cookies
• Implement CSRF tokens
• Validate Origin headers

Regular security audits and penetration testing are recommended.

Protect your authentication endpoints with configurable rate limiting rules.

Basic Configuration

rateLimits:
  login:
    windowMs: 900000 # 15 minutes
    max: 5 # limit each IP to 5 requests per windowMs
  register:
    windowMs: 3600000 # 1 hour
    max: 3
  passwordReset:
    windowMs: 3600000
    max: 3

Custom Rules

const customLimiter = rateLimit({
  keyGenerator: (req) => {
    return req.headers['x-api-key'] || req.ip;
  },
  handler: (req, res) => {
    res.status(429).json({
      error: 'Too many requests',
      retryAfter: 60
    });
  }
});

Redis-Based Rate Limiting

const redisStore = new RedisStore({
  client: redisClient,
  prefix: 'rl:'
});

const limiter = rateLimit({
  store: redisStore,
  windowMs: 15 * 60 * 1000,
  max: 100
});

Bypass Rules

const bypassList = ['trusted-ip-1', 'trusted-ip-2'];

if (bypassList.includes(req.ip)) {
  return next();
}

For distributed rate limiting, see our scaling guide.

Configure password policies to enforce strong authentication security standards.

Basic Policy Configuration

{
  "passwordPolicy": {
    "minLength": 12,
    "requireUppercase": true,
    "requireLowercase": true,
    "requireNumbers": true,
    "requireSpecialChars": true,
    "maxLength": 128
  }
}

Advanced Rules

const advancedPolicy = {
  preventCommonPasswords: true,
  preventUserInfo: true,
  minUniqueChars: 5,
  preventRepeatingChars: 3,
  preventSequentialChars: 3
};

Password History

passwordHistory:
  enabled: true
  rememberCount: 5
  minimumAgeDays: 1

Expiration Policy

const expirationPolicy = {
  enabled: true,
  expirationDays: 90,
  warningDays: 14,
  gracePeriodDays: 7
};

Breach Detection

auth.passwordPolicy.enableBreachDetection({
  checkAgainstLeaks: true,
  autoForceReset: true,
  notifyUser: true
});

For custom validation rules and enterprise policies, see our security guide.